VANCOUVER -- Vancouver police have concluded their probe into the death of Cory Monteith, now that the B.C. Coroner Services has determined the Glee star died of a heroin and alcohol cocktail consumed when he was alone.

"From the police perspective, the investigation has been concluded," since the cause of death was established as an accidental overdose, Vancouver police constable Brian Montague told reporters in Vancouver late Tuesday.

Vancouver police will also not pursue whoever supplied Monteith with heroin during his stay in the city that led up to his lifeless body being discovered by cleaning staff at the Fairmount Pacific Rim hotel on Sunday.

At the same time, the Royal Canadian Mounted Police, Canada's federal police force, could take over any criminal investigation into Monteith's death, given the presence of illegal drugs in the case.

"There's absolutely nothing at this point … to suggest this is anything other than the most sad and tragic accident," B.C. Coroner's Service spokeswoman Barb McLintock said earlier on Tuesday in a video posted on YouTube.

The police investigation included taking statements from the three companions, whose identities were not disclosed.

The police probe concluded that Monteith returned to his room at The Fairmount early Saturday morning around 2:15 a.m. and died alone, leaving any continuing investigation into his death to be completed by the local coroners office.